System.Text.Tests.StringBuilderTests.Equals_TestData C# (CSharp) Method

        public static IEnumerable<object[]> Equals_TestData()
        {
            var sb1 = new StringBuilder("Hello");
            var sb2 = new StringBuilder("Hello");
            var sb3 = new StringBuilder("HelloX");

            var sb4 = new StringBuilder(10, 20);
            var sb5 = new StringBuilder(10, 20);
            var sb6 = new StringBuilder(10, 21);
            var sb7 = new StringBuilder(11, 20);

            var sb8 = new StringBuilder(10, 20);
            sb8.Append("Hello");
            var sb9 = new StringBuilder(10, 20);
            sb9.Append("Hello");
            var sb10 = new StringBuilder(10, 20);
            sb10.Append("HelloX");

            yield return new object[] { sb1, sb1, true };
            yield return new object[] { sb1, sb2, true };
            yield return new object[] { sb1, sb3, false };

            yield return new object[] { sb4, sb5, true };
            yield return new object[] { sb4, sb6, false };
            yield return new object[] { sb4, sb7, false };

            yield return new object[] { sb8, sb9, true };
            yield return new object[] { sb8, sb10, false };

            yield return new object[] { sb1, null, false };

            StringBuilder chunkSplitBuilder = StringBuilderWithMultipleChunks();
            yield return new object[] { chunkSplitBuilder, StringBuilderWithMultipleChunks(), true };
            yield return new object[] { sb1, chunkSplitBuilder, false };
            yield return new object[] { chunkSplitBuilder, sb1, false };
            yield return new object[] { chunkSplitBuilder, StringBuilderWithMultipleChunks().Append("b"), false };

            yield return new object[] { new StringBuilder(), new StringBuilder(), true };
            yield return new object[] { new StringBuilder(), new StringBuilder().Clear(), true };
        }